Manifold



Aug. 4, 1931. o. c. KREIS MANIFQLD Filed March 30, 1929 INVENTOR. arms dfie /a ATTORNEY.

Patented Aug. 4, 1931 UNITED STATES OSCAR C. KREIS, OF DETROIT, MICHIGAN, ASSIGNOR TOOONTINENTAL MOTORS COR-IO- RATION, OF DETROIT, MICHIGAN, AOORPORATION OF VIRGINIA MANIFOLD Original application filed November 3,

This invention relates to internal combustion engines and refers more particularly to an intake'manifold.

In the present types of intake manifolds, particularly for engines of six and more cylinders, difiiculty has been experienced in distributing the combustible mixture equally 7 of the engine.

In my invention I provide a separate manifold conduit for each cylinder so that any wet or unvaporized particles of fuel or mix-" ture entering any of the several conduits will eventually reach its communicating cylinder avoiding the possibility of supplying any one cylinder with more of the unvaporized particles than any other. A substantially e ual distribution of intake mixture is there y afforded for each cylinder resulting in increased engine efficiency. At the same time I contemplate the elimination of much, if not all, of the manifold heating which is ordinarily employed with resulting increased engine efliciency and a better engine power output.

A further beneficial result of my invention resides in providing independent manifold conduits for the cylinders whereby the gas surge to any cylinder will not be materially interfered with by any other cylinder intake.

In carrying out my invention I find it desirable to provide a chamber communicating with the mixing carburetor, the individual conduits for each cylinder being branched generally longitudinally of the engine to I the respective cylinders. With such an ar rangement the conduits may be made of relatively large cross sectional area, affording type for example.

This application 1s a division of my 00- pending application Ser. No. 280,730 filed November 3, 1927.

hicles.

greater power output for the engine. My

invention is especiallyuseful in engines having six cylinders in line, greater difliculty of the aforesaid nature having been experienced with such an englne than in the four cylinder Other features of my invention reside in the combination and arrangement of partsv more particularly, hereinafter described and claimed.

Referring to the drawings in which like reference characters indicate corresponding Fig. 1 1s a side elevation view of an internal combustionengine showing my manifold applied thereto,

- Fig. 2 is a sectional elevation view of the intake manifold, and k I.

' Fig. 3-is a detail sectional view through 3-305 Fig. 1.

In the drawings reference character A represents the engine, illustrated as having six cylinders in line, B representing the exhaust manifold and G the intake manifold. The engine A may be of the well known general construction such as used for automotive ve- The intake manifold chamber 1O which may be divided by a partition 29, the chamber extending generally vertically from an inlet 11 which communicates with the mixing carburetor preferably of the well known duplex or dual type af-- G comprises a central rear wall 13, and side walls 14 and 15. The V I chamber ,10 is preferably substantially rectangular'in cross-section and may have its side walls 1 1, 15 tapering upwardly and inwardly to facilitate the fuel distribution. Thus the chamber volume is proportioned to the demand of the conduits referred to hereina fter.

Extending longitudinally of the engine 1 above the conduits 16 17 and the conduits 20, 21 leading to the end cylinders having similarly aligned openings in the chamber The entire manifold C may be cast integrally with single dividing walls between adjacent conduits as shown. The areas of the conduits are preferably relatively greater than standard practice, any precipitation of wet particles resulting from such increased area being carried along to the particular cylinder communicating with the respective conduits By arranging the conduits and chamber 1O as shown, the distance from the chamber inlet 11 to each cylinder is equalized to some extent. Thus conduits 16, 17 a supplyingthe central cylinders open into chamber 10 near the bottom thereof, the chamber openings of conduits 18, 19 supplying the intermediate cylinders being next above, and

the chamber openings for conduits 20*, 21

supplying the end cylinders being next above or near the top of chamber 10*.

I have not illustrated the usual heating jacket around the intake manifold above the carburetor connection inasmuch as such jacketing is well known in the art and may be employed as desired. However, one feature of my invention resides in a construction which will eliminate much, if not all, of the heating ordinarily employed as previously set forth, I do not limit my invention, apart from the claims, to the presence or absence of a heating jacket since in either event my manifold construction will afford improved results.

What I claim as my invention is:

1. An intake manifold for multi-cylinder internal combustion engines comprising fuel mixture chamber means opening vertically for admission of a fuel mixture, and a plurality of conduits each opening into the said chamber means and each extending for connection to an individual. engine cylinder intake, the conduit openings to the chamber means being arranged substantially in a common vertical plane with those conduits supplying the inner cylinders located below those conduits supplying the outer cylinders.

2. An intake manifold for a six cylinder internal combustion engine comprising chamber means opening downwardly for admission of afuel mixture and closed at the top, and six conduits arranged in two groups of three vertically spaced conduits, each conduit opening into the chamber and extending generally longitudiiially of the engine for connection with a single cylinder intake, the con nit openings for the central pair of cylinders being below the conduit openings for the second and fifth cylinders and the latter conduit openings being below the conluit openings for the end cylinders.

3; in intake manifold for multi-cylinder internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture, and a plurality of conduits vertically arranged in groups, the conduits of each group opening into the said chaz uber and each conduit of each group opening into the said chamber and each conduit of each group extending for communr, cater. w h single cylinder intake, the cyl-' est the chamber having their said i openings below those which supply ders relatively remote from the chamn intake manifold for a six cylinder iutei nil combus ion engine comprising a tapering vertically extending chamber openg downwardly for admission of a fuel mixture and closed at the top, and six separate All of each group opening into the said chamber and each conduit of each *roup extending.

for communication with a single cylinder intake, the chamber conduit openings of each group being spaced vertically of the chamber with these conduit openings supplying luii s arranged in two groups of three con the end cylinders spaced above those conduit ogenings supplying inner cylinders.

(S. An intake manifold for a six cylinder internal combustion engine comprising a vertica ly cx'tci'iding chamber opening downwardly for admission of a fuel mixture and; closed the top, and six separate conduits arranged in two groups of three conduits, each. conduit opening into said chamber and eacnconnected with a single cylinder intake,

the chamber conduit openings of each group being spaced vertically of the chamber with those conduit openings supplying the end cylinders spaced above those conduit openi.-.e's supplying the inner and intermediate .1 cylinders.

l. An intake manifold for internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture and a plurality of conduits arranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communication with a single cylinder intake, the chamber conduit openings of each group being spaced vertically of the chamber, the conduits connecting the central pair of cylinder intakes communicating with the lower portion of said chamber.

8. An intake manifold for internal com-' bustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture and a plurality of conduits arranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communication with a single cylinder intake, the chamber conduit openings of each group being spaced vertically of the chamber, the conduits connecting the central pair of cylinder intakes communicating with the lower portion of said chamber, the conduits connecting the end cylinder intakes communicating with the upper portion of said chamber.

9. An intake manifold for internal combustion engines comprising a chamber having opposed front and rear walls, opposed side walls, a top wall, and opening downwardly for admission of a fuel mixture, a group of conduits opening into one of' the chamber side walls and a second group of conduits opening into the other of the chamber side walls, each conduit of each group extending for connection with a single cylinder intake, the conduit openings to the chamber means being arranged substantially in-a common vertical plane, said chamber having a central vertical portion depending from the top wall and extending substantially to the chamber opening.

10. An intake manifold for internal comsaid chamber having a partition dividing the. chamber 1nto two non-comn1un1cat1ng portions, each chamber portion supplying a group of the said conduits with fuel mixture.

11. An intake manifold for a six cylinder internal combustion engine comprising a chamber opening downwardly for admission of a fuel mixture and closed at the top,.and six conduits arranged in two groups of three conduits, each conduit opening into the chamber and extending generally longitudinally of the engine for connection wlth a S111- gle cylinder intake, the cylinders nearest the chamber havin their sald conduit openings below those WhlCh supply cylinders relatively remote from the chamber, said chamber having a partition dividing the chamber into two non-communicating portions each chamber portion respectively supplying the said groups of conduits with fuel mixture.

12. An intake manifold for an in line internal combustion engine comprising a chamber opening downwardly for admission of a fuel mixture, and a plurality of conduitseach opening into the said chamber and each extending for connection to an individual engine cylinder intake, said chamber located substantially midway of the ends of the engine and having a partition extending in a plane substantially perpendicular to the longitudinal axial plane of the engine for di viding the chamber into two non-communicating portions, one chamber portion supplying a group of conduits connecting the cylinders in front of said chamber and the other chamber portion supply a group of conduits connecting those cylinders located to the rear of said chamber.

In witness whereof, I hereunto subscribe my name this 26th da of March, 1929. v

SCAR C. KREIS. 

